Door 2 Door Sales System -Servlet

There is this application running on TomCat it was written by a former member our small business , who happens to be my brother, he ´s now gone to Europe, so we need someone to fix a few bugs, and depending on the results we´d do some improvements when all its fixed, he used java servelet to create this app to us, it runs on a remote widows 2003 server, the web app is used by a few subcontractors selling door to door subscription services, e.g . they log in to imput sales Data , like address, personal info etc , and what they want for service e.g basic cable, internet etc, so we use the system to create reports, follow up on installations ( even knowing we do not install ), if there are Brazilians coders it would be a plus.